Adjustable booster seat



FIG. 1 is a front perspective view of an adjustable booster seat showing our new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a left side elevational view thereof;

FIG. 4 is a right side elevational view thereof;

FIG. 5 is a front elevational view thereof;

FIG. 6 is a rear elevational view thereof; and,

FIG. 7 is a bottom plan view thereof.

FIGS. 2-7 have been drawn on a enlarged scale with respect to FIG. 1. 

The ornamental design for an adjustable booster seat, as shown and described. 